Elixir 1 doesn't use CPS washers

Be careful... If I recall correctly, Elixir 1s don't use CPS washers between the caliper and the mount. You will need to use the CPS washers between the caliper and the bolt heads to allow for the slight angling of the bolts that the 185 post mount adapter creates.

Did you buy the Elixir 1 calipers by themselves or did you get rotors with them ?

From what I can see the 2012 Elixir 1's are sold with 180mm rotors not 185mm rotors, if you use a 185mm adapter with a 180mm rotor you'll probably have about 2.5mm of pad material overhanging the outer edge of the rotor, this is a bad thing.

The "20mm PM - 180 PM Front/160 PM Rear" adapter on the following page is the right adapter for a 180mm rotor.